<?php
/**
 * crcl/base
 *
 * Copyright 2013 CRCL - André Sabosch - info@crcl.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace crcl\base;

interface IDatabase
{
  /**
   * Returns mysql container as multiton
   *
   * @param null $sAlias
   *
   * @return \crcl\base\database\container\IMysql $oMysql
   */
  public static function mysql($sAlias = \NULL);
}

abstract class Database extends instance\Multiton implements IDatabase
{
  const TYPE_MYSQL = 'mysql';

  public static function mysql($sAlias = \NULL)
  {
    return self::getInstanceDefault(self::TYPE_MYSQL, $sAlias);
  }

  /** PROTECTED ***********************************************************************************/

  protected static $sFactoryDirectory = 'database\container';
  protected static $aFactoryAllowedTypes = array(self::TYPE_MYSQL);

  /** PRIVATE *************************************************************************************/

  private static function getInstanceDefault($sType, $sAlias = \NULL)
  {
    if (\is_null($sAlias))
    {
      $sAlias = \crcl\base\Config::reader()
                ->get('database', $sType);
    }
    return self::getInstance($sAlias);
  }

}